Data as of Nov 10, 2026
12.39.57.0/24
No anonymizer space · no proxy exits in 30 daysAT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 12.0.0.0/8 | AS7018 | Residential | 13,384 731 always on | AT&T Enterprises, LLC |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
256 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Business | 240 | 94% | 33 | |
| Mobile | 16 | 6.3% | 2 |
Network & registry
Announced by
Covering announcement 12.0.0.0/9
- Prefix
- 12.0.0.0/9
- Announced by
- AS7018 AT&T Enterprises, LLC
- Type
- Residential
- Proxy exits
- 8,073
- Always-on exits
- 434
- RPKI
- No RPKI
- Netname
- ATT
- Registrant
- AT&T Enterprises, LLC
- RIR
- ARIN
Origin network
AS7018
US
- Name
- AT&T Enterprises, LLC
- Type
- Internet provider
- Registered
- Jul 30, 1996
- Domain
- att.com
- Website
- www.att.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
12.0.0.0/9
Routing history
- First seen
- Before our records
- Origin networks
- 1
IRR
Route objects on 12.0.0.0/9
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS7018 | ARIN | 12/8 lower half | MNT-AEL-360 | Jul 21, 2025 |
Whois
Registration for this announcement
- Range
- 12.
0. 0. 0/ 8 - Netname
- ATT
- Registrant
- AT&T Enterprises, LLC
- Organization
- AT&T Enterprises, LLC (AEL-360)
- Org address
- 208 S. Akard St., Dallas, TX, 75202
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-12-0-0-0-1
- Parent
- NET-12-0-0-0-0
- Created
- Aug 23, 1983
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 23, 1983
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN